Electric heater with built-in temperature control device

Abstract

The utility model relates to the technical field of electric heaters, and discloses an electric heater with a built-in temperature control device, which comprises an electric heater shell, a plurality of heating pipes and a liquid guide cylinder, a supporting disc is fixedly arranged in the electric heater shell, a plurality of heating pipes are arranged on the side edge of the supporting disc at equal intervals, and the heating pipes surround and wrap the outer ring of the liquid guide cylinder. A liquid inlet is fixed to the top of one end of the electric heater shell, a liquid outlet is fixed to the bottom of the other end of the electric heater shell, and the liquid outlet penetrates through the heating pipe to extend and penetrate into the liquid guide cylinder. According to the electric heater, heating is more uniform, the problem that when an existing electric heater is used, internal heating is not uniform enough, and the temperature is inconvenient to control is solved, liquid is heated more uniformly during heating, meanwhile, energy is saved, the environment is protected, and the heating precision of the electric heater during use is improved.

Description

Technical Field

[0001] The utility model application relates to the technical field of electric heaters, in particular to an electric heater with a built-in temperature control device. Background Art

[0002] Electric heater is an electric heating equipment used for heating, heat preservation and heating of flowing liquid and gaseous media. When the heating medium passes through the heating chamber of the electric heater under pressure, the huge heat generated by the electric heating element during operation is evenly taken away by the principle of fluid thermodynamics, so that the temperature of the heated medium meets the user's process requirements.

[0003] When the liquid to be heated, such as water, enters the electric heater for heating, since the heating tubes inside many electric heaters are of a wrapped design, the outer liquid will be heated first, and the center of the liquid will be less heated, resulting in uneven heating of the liquid and the inability to accurately control the overall heating inside, reducing the accuracy of the electric heater when used. Summary of the invention

[0004] In order to solve the problem that the internal heating of the existing electric heater is not uniform and the temperature is not easy to control when in use, the utility model provides an electric heater with a built-in temperature control device to solve the above problem.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An electric heater with a built-in temperature control device comprises an electric heater housing, a heating tube and a liquid guide tube, wherein a support plate is fixedly arranged inside the electric heater housing, and a plurality of heating tubes are equidistantly arranged on the side of the support plate, and the heating tubes are wrapped around the outer ring of the liquid guide tube, a liquid inlet is fixedly arranged on the top of one end of the electric heater housing, and a liquid outlet is fixedly arranged on the bottom of the other end of the electric heater housing, and the liquid outlet extends through the heating tube to the inside of the liquid guide tube;

[0007] A liquid guide tube is fixed through the liquid outlet, and the liquid guide tube passes through the heating tube and extends into the liquid guide tube. A driving impeller is rotatably connected to the inside of the liquid outlet via a bearing, and a rotating rod is fixedly sleeved inside the driving impeller. The other end of the rotating rod is rotatably connected to the inner wall of the other end of the liquid guide tube via a bearing, and a plurality of stirring rods are equidistantly fixed to the outer surface of the rotating rod.

[0008] Furthermore, a detection shell is embedded and fixed in the middle of the electric heater shell, and a plurality of temperature sensors are arranged at equal distances inside the detection shell, and an output end of the temperature sensor is externally connected to a controller.

[0009] Furthermore, both ends of the electric heater shell are detachably connected with an inspection shell by flanges and bolts, and the interior of the inspection shell is through-connected with the outer ring of the guide tube for opening the interior of the electric heater shell for inspection.

[0010] Furthermore, one end of each stirring rod away from the rotating rod is configured to be arc-shaped, and one end of each stirring rod away from the rotating rod is slidably fitted on the inner wall of the liquid guiding tube.

[0011] Furthermore, a plurality of heat conducting plates are equidistantly fixed on one side of each heating tube, and a snap-fit ​​groove is provided on the end of the heat conducting plate away from the heating tube. Each heat conducting plate is snap-fitted onto the positioning rod through the snap-fit ​​groove, and the positioning rod is fixed on the other side of the adjacent heating tube.

[0012] Furthermore, each of the heat conducting plates is configured to be in an arc shape that matches the support plate, and the thickness of each of the heat conducting plates and the engaging groove is smaller than the thickness of the heating tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, the liquid inside the electric heater can be stirred and mixed by the rotation driven by the impact when the liquid enters, so that the heating is more uniform, which solves the problem of uneven internal heating and inconvenient temperature control of the existing electric heater during use, so that the liquid is heated more evenly during heating, and at the same time it is energy-saving and environmentally friendly, and improves the heating accuracy of the electric heater during use.

[0015] 2. In the utility model, heat is conducted through the heat conduction plate, so that the heating between the two heating tubes is more uniform, and the detachable design of the heat conduction plate allows each heating tube to be disassembled and repaired separately, making the maintenance of the electric heater more convenient and labor-saving, and also facilitating the assembly of the heating tube after repair, further improving the practicality of the electric heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a front view schematic diagram of the electric heating tube structure according to an embodiment of the present application;

[0018] Figure 2 yes Figure 1 A bottom view schematic diagram of the electric heating tube structure in the illustrated embodiment;

[0019] Figure 3 yes Figure 1 A schematic diagram of the connection structure of the stirring rod in the embodiment shown;

[0020] Figure 4 yes Figure 1 A schematic diagram of the structure of the embodiment shown.

[0021] The meanings of the reference numerals in the figure are: 1. motor heater housing; 2. detection housing; 3. maintenance housing; 4. liquid inlet; 5. liquid outlet; 6. liquid guide tube; 7. driving impeller; 8. rotating rod; 9. stirring rod; 10. supporting plate; 11. heating tube; 12. heat conduction plate; 13. positioning rod; 14. snap-fit ​​groove; 15. liquid guide tube. DETAILED DESCRIPTION

[0022] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Reference Figure 1 , Figure 2 and Figure 3 , an electric heater with a built-in temperature control device, comprising an electric heater shell 1, a heating tube 11 and a liquid guide tube 15, a detection shell 2 is embedded and fixed in the middle of the electric heater shell 1, and a plurality of temperature sensors are arranged equidistantly inside the detection shell 2, and an output end of the temperature sensor is externally connected to a controller, both ends of the electric heater shell 1 are detachably connected with an inspection shell 3 by flanges and bolts, and the interior of the inspection shell 3 is connected through and through with an outer ring of the guide tube, so as to open the interior of the electric heater shell 1 for inspection, a support plate 10 is fixedly arranged inside the electric heater shell 1, and a plurality of heating tubes 11 are equidistantly arranged on the sides of the support plate 10, and the heating tubes 11 are wrapped around the outer ring of the liquid guide tube 15, a liquid inlet 4 is fixed on the top of one end of the electric heater shell 1, and a liquid outlet 5 is fixed on the bottom of the other end of the electric heater shell 1, and the liquid outlet 5 extends through the heating tube 11 to the interior of the liquid guide tube 15;

[0024] A liquid guide tube 6 is fixed through the liquid outlet 5, and the liquid guide tube 6 extends through the heating tube 11 to the inside of the liquid guide tube 15. A driving impeller 7 is rotatably connected to the inside of the liquid outlet 5 through a bearing, and a rotating rod 8 is fixedly sleeved inside the driving impeller 7. The other end of the rotating rod 8 is rotatably connected to the inner wall of the other end of the liquid guide tube 15 through a bearing. A plurality of stirring rods 9 are equidistantly fixed on the outer surface of the rotating rod 8. The end of each stirring rod 9 away from the rotating rod 8 is set to an arc shape, and the end of the stirring rod 9 away from the rotating rod 8 is slidably fitted on the inner wall of the liquid guide tube 15.

[0025] Specifically, when the liquid enters the electric heater shell 1 through the liquid inlet 4, it always flows along one side of the driving impeller 7 under the left and right of the guide tube 6, and when it flows to the blades on the impact driving impeller 7, it drives the driving impeller 7 to rotate. When the driving impeller 7 rotates, it drives the rotating rod 8 to rotate, and the stirring rod 9 can be driven by the rotating rod 8 to rotate. When the stirring rod 9 rotates, the liquid is stirred, so that the liquid inside the liquid guide tube 15 is heated evenly. At the same time, the temperature sensor inside the detection shell 2 detects the liquid temperature.

[0026] As an optimization solution, Figure 4 As shown, a plurality of heat conducting plates 12 are fixed at equal distances on one side of each heating tube 11, and a snap-fitting groove 14 is provided on the end of the heat conducting plate 12 away from the heating tube 11. Each heat conducting plate 12 is snap-fitted and sleeved on the positioning rod 13 through the snap-fitting groove 14, and the positioning rod 13 is fixed on the other side of the adjacent heating tube 11. Each heat conducting plate 12 is arranged in an arc shape that matches the support plate 10, and the thickness of each heat conducting plate 12 and the snap-fitting groove 14 is less than the thickness of the heating tube 11.

[0027] Specifically, when heating, both ends of the heat conduction plate 12 are in contact with the heating tube 11, so that heat conduction can be carried out, and the outer surface of the liquid guide tube 15 between the two heating tubes 11 is heated, so that the liquid heating is more uniform. When repairing the heating tube 11, the inspection shell 3 is opened, and the heating tube 11 is directly pulled horizontally, and the heating tube 11 can be extracted for separate repair. When necessary, the locking groove 14 is aligned with the positioning rod 13, and then the heating tube 11 is aligned and inserted for installation.

[0028] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0029] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric heater with a built-in temperature control device, comprising an electric heater housing (1), a heating tube (11) and a liquid guide tube (15), Features: A support plate (10) is fixedly arranged inside the electric heater housing (1), and a plurality of heating tubes (11) are equidistantly arranged on the side of the support plate (10), and the heating tubes (11) are wrapped around the outer ring of the liquid guide tube (15). A liquid inlet (4) is fixed on the top of one end of the electric heater housing (1), and a liquid outlet (5) is fixed on the bottom of the other end of the electric heater housing (1), and the liquid outlet (5) passes through the heating tube (11) and extends through the inside of the liquid guide tube (15); A liquid guide tube (6) is fixedly connected through the liquid outlet (5), and the liquid guide tube (6) passes through the heating tube (11) and extends through the inside of the liquid guide tube (15). A driving impeller (7) is rotatably connected to the inside of the liquid outlet (5) via a bearing, and a rotating rod (8) is fixedly sleeved inside the driving impeller (7). The other end of the rotating rod (8) is rotatably connected to the inner wall of the other end of the liquid guide tube (15) via a bearing. A plurality of stirring rods (9) are equidistantly fixed to the outer surface of the rotating rod (8).

2. The electric heater with a built-in temperature control device according to claim 1, Features: A detection shell (2) is embedded and fixed in the middle of the electric heater shell (1), and a plurality of temperature sensors are arranged at equal intervals inside the detection shell (2), and the output end of the temperature sensor is externally connected to a controller.

3. The electric heater with a built-in temperature control device according to claim 1, Features: Both ends of the electric heater housing (1) are detachably connected to an inspection housing (3) by flanges and bolts, and the interior of the inspection housing (3) is connected to the outer ring of the guide tube for opening the interior of the electric heater housing (1) for inspection.

4. The electric heater with a built-in temperature control device according to claim 1, Features: One end of each stirring rod (9) away from the rotating rod (8) is configured to be arc-shaped, and one end of each stirring rod (9) away from the rotating rod (8) is slidably fitted on the inner wall of the liquid guide tube (15).

5. The electric heater with built-in temperature control device according to claim 1, Features: A plurality of heat conducting plates (12) are fixed at equal distances on one side of each heating tube (11), and a clamping groove (14) is provided on one end of the heat conducting plate (12) away from the heating tube (11). Each heat conducting plate (12) is clamped and sleeved on a positioning rod (13) through the clamping groove (14), and the positioning rod (13) is fixed on the other side of an adjacent heating tube (11).

6. The electric heater with built-in temperature control device according to claim 5, Features: Each of the heat conducting plates (12) is configured to be in an arc shape that matches the support plate (10), and the thickness of each of the heat conducting plates (12) and the engaging groove (14) is smaller than the thickness of the heating tube (11).

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